books.google.com - Engineers need to acquire “Back-of-the-Envelope” survival skills to obtain rough quantitative answers to real-world problems, particularly when working on projects with enormous complexity and very limited resources. In the case studies treated in this book, we show step-by-step examples of the physical...http://books.google.com/books/about/Aerospace_Engineering_on_the_Back_of_an.html?id=Jk-W9w0oVv4C&q=maximum&utm_source=gb-gplus-shareAerospace Engineering on the Back of an Envelope